Converts Bezier handle types when transforming starts. If single BEZIER_HANDLE_AUTO handle is transformed it becomes BEZIER_HANDLE_ALIGN. If single BEZIER_HANDLE_VECTOR handle is transformed it becomes BEZIER_HANDLE_FREE. https://docs.blender.org/manual/en/latest/modeling/curves/structure.html Rel #105038 Pull Request: https://projects.blender.org/blender/blender/pulls/128638